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Old 10-01-2004, 11:32 PM   #1
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Default electronic vacuum modulator

Does this exist? As you probably know, my transmission is vacuum controlled, and in the article Dr. Jay posted about the ultimate guide to transmissions, one of the article talked about an adjustable vacuum modulator. Well, that is mechanically adjustable, i need one that is electronically adjustable, that way I can have a switch in the car somewhere to adjust the firmness. Kinda off topic from electrical, but does it shift firmer with more vacuum, and softer with less?


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Old 10-01-2004, 11:35 PM   #2
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Default Shift Point Adjustment

double post - admins delete this post [not whole thread].


-justin
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Old 10-02-2004, 12:10 AM   #3
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would awsome if we could shift our bonnies manually...
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Old 10-02-2004, 12:22 AM   #4
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I think it is possible. I am believing it to be several sets of wires and such, and one wire grounded = 1st, a different one grounded = 2nd, and so on. Plus there is a switch for TCC lockup, which would be cool to be able to override, and then be able to switch it back to having the ECU control it. I just need some input on the electricial guys up in here.. and what their opinion'* are on this.


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Old 10-02-2004, 12:23 AM   #5
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www.howstuffworks.com

Manually shifting will set codes
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Old 10-02-2004, 12:34 AM   #6
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Why would it set codes? Is the ECU notified of the gears? Because I don't think it is, if it is, I am sure there is a way to make it happy.


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Old 10-02-2004, 12:37 AM   #7
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see if you can get ahold of a schematic from one of those tapshifting GP'*...

I guess I'll crack open my 87 FSM and see what you're looking at....
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Old 10-02-2004, 12:50 AM   #8
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What years for the GP'* have the "tap shifting" and is that like push button shifting?

Let me do a little more seaching, and i can give you the page number.


-justin
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Old 10-02-2004, 01:36 AM   #9
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it seems I was incorrect in my looking at the schematics. There is a connector, which tells the ECU what gear the tranny is in. The tranny only controls TCC lockup, because of what the data the tranny gives the ECU, and also controls fuel/spark by the data also. So, that button shifting is now out of the question, unless I were to get a newer engine/tranny, but giving up my LN3.. never gonna happen. Still on the lookout for that electronic controlled vacuum modulator.


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Old 10-02-2004, 03:05 AM   #10
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Yeah, that'* what i figured you saw as soon as i saw the P/N switch... Anyway. Maybe a way to wire in external servo control?
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